ordering → base_altitude

src/c3nav/mapdata/migrations/0031_auto_20170805_1647.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.2 on 2017-08-05 14:47
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mapdata', '0030_altitudes'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='level',
+            options={'ordering': ['base_altitude'], 'verbose_name': 'Level', 'verbose_name_plural': 'Levels'},
+        ),
+        migrations.RenameField(
+            model_name='level',
+            old_name='ordering',
+            new_name='base_altitude',
+        ),
+        migrations.AlterField(
+            model_name='level',
+            name='base_altitude',
+            field=models.DecimalField(decimal_places=2, max_digits=6, unique=True, verbose_name='base altitude'),
+        ),
+    ]

src/c3nav/mapdata/models/level.py

@@ -15,7 +15,7 @@ class Level(SpecificLocation, models.Model):
     """
     A map level
     """
-    ordering = models.DecimalField(_('ordering'), null=False, unique=True, max_digits=6, decimal_places=2)
+    base_altitude = models.DecimalField(_('base altitude'), null=False, unique=True, max_digits=6, decimal_places=2)
     on_top_of = models.ForeignKey('mapdata.Level', null=True, on_delete=models.CASCADE,
                                   related_name='levels_on_top', verbose_name=_('on top of'))
 
@@ -23,7 +23,7 @@ class Level(SpecificLocation, models.Model):
         verbose_name = _('Level')
         verbose_name_plural = _('Levels')
         default_related_name = 'levels'
-        ordering = ['ordering']
+        ordering = ['base_altitude']
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -33,14 +33,16 @@ class Level(SpecificLocation, models.Model):
             raise TypeError
         if level_model is None:
             level_model = Level
-        return level_model.objects.filter(ordering__lt=self.ordering, on_top_of__isnull=True).order_by('-ordering')
+        return level_model.objects.filter(base_altitude__lt=self.base_altitude,
+                                          on_top_of__isnull=True).order_by('-base_altitude')
 
     def higher(self, level_model=None):
         if self.on_top_of_id is not None:
             raise TypeError
         if level_model is None:
             level_model = Level
-        return level_model.objects.filter(ordering__gt=self.ordering, on_top_of__isnull=True).order_by('ordering')
+        return level_model.objects.filter(base_altitude__gt=self.base_altitude,
+                                          on_top_of__isnull=True).order_by('base_altitude')
 
     @property
     def sublevels(self):
@@ -62,7 +64,7 @@ class Level(SpecificLocation, models.Model):
 
     def _serialize(self, level=True, **kwargs):
         result = super()._serialize(**kwargs)
-        result['ordering'] = float(str(self.ordering))
+        result['base_altitude'] = float(str(self.base_altitude))
         return result
 
     def _render_space_ground(self, svg, space):